From mboxrd@z Thu Jan 1 00:00:00 1970 Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.remote-ip=100.103.45.18 ARC-Seal: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; cv=none; t=1793585584; b=Z/KuDVaZGqYY8EI2imSc05tLAL0GljW3DkDEuoi/wS1saZR4q4CUOn/q5hDAApaLlXKi 6Qkws+ib2zFVXNjBJ59eckDAotQRHrauK6a2fT7vm7pLf/nLiQyeCfmPoHqZXKGklJ7m+ 9GgEQVU11XT3q3r3St6poLZLPG4UDVQanPS+2R3pIamUkHU1+ffXJNpTejPiGfai8S+79 eeXh2heMS62rr/wF8wRBLmdjGvMuzK9SkQf3ArclCfFsSxMtrukT19QzQZM2CiN0cFYQr AK/dza0lYhNgNj7ZAH3frEaEaobV5mcE+bdNflxWNRvIr5nhaPHY1Ne1vBjPR1bwY7w== ARC-Message-Signature: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; c=relaxed/relaxed; t=1793585584; h=Received:DKIM-Signature:From:To:Cc:Subject:Date:Message-ID:X-Mailer: In-Reply-To:References:MIME-Version:Content-Transfer-Encoding; bh=TkvIJtT2uYGtfsA/9mgNPYvW+4raY7xxarpE4GskwG4=; b=A7hwYP3S0Q+nzfVXlQdmZN2ojNyj9FFxS6lyKnVDLVGZos0ZST6w+rl/FJQMy199w9JX XeWOFLUhVAO1uhrYzaKMzOW4gJIoCsI7JvqDFp/q8JkFp4hWCdaHkVOK2vYbW0z0i1/Qw EwMtt95FKCeVzXxhR37jkA8BdoKYd3G9yD/+kwWovfICWJfezjKs5VinZ9xVPRImPB/kg PV84zz8xlBq9y3FTG1fDaaiNWAU3U4nUJHS+tnco01ot94lEX+MddEVeaZBG32e9eKItR pe1O0ggrB//UP/nhl7uYOiTqfMM36NWb2qaFZdWvitW8K3/x1vxZRM4d566+zIbF/WQ== ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass header.d=kernel.org header.i=@kernel.org header.a=rsa-sha256 header.s=k20260515 header.b=lpH+uFkT; arc=none smtp.remote-ip=100.103.45.18 Received: from smtp.kernel.org (quasi.space.kernel.org [100.103.45.18]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (prime256v1)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id C9B7F60A260D; Mon, 2 Nov 2026 02:13:03 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key, unprotected) header.d=kernel.org header.i=@kernel.org header.a=rsa-sha256 header.s=k20260515 header.b=lpH+uFkT Received: by smtp.kernel.org (Postfix) with ESMTPSA id 695711F00A21; Mon, 2 Nov 2026 02:13:01 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1793585583; bh=TkvIJtT2uYGtfsA/9mgNPYvW+4raY7xxarpE4GskwG4=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=lpH+uFkTQZFHTxIMxofFzG+AROrhUVNLOExV6ySbiMHI24I7Y060fxAfg+HZ2inkC Ba3BGA6FbhitxRQvhDptUgrWBZuVHH6EkOGt4oLu5Zr3uVBs1VTz0aROT/4O59nkD2 a9vRwkLtdFahndvcZ0SGpEFqTitzz8RDSwmgaCyxOq2QcCTX2R/uCMLU9GJU7PgIXR ttMgq7pxEgMDwVKcbS5POWsck/TF8esO1TkXlx7Orcpp3q3Sltz2z8OH+g3aGdGZq5 eCVVITT1pI4LRKHYenL0Ft4sQtODz7p6UPyWiMf5IAhqT7JlfeaJY830rW1M4on/Av Q0KnQgoxmfYAA== From: Sasha Levin To: Nathan Chancellor , Nicolas Schier , linux-kbuild@vger.kernel.org Cc: Sasha Levin , Shuah Khan , linux-kselftest@vger.kernel.org, Peter Zijlstra , Ingo Molnar , Arnaldo Carvalho de Melo , Namhyung Kim , Mark Rutland , Alexander Shishkin , Jiri Olsa , Ian Rogers , Adrian Hunter , James Clark , linux-perf-users@vger.kernel.org, =?UTF-8?q?Thomas=20Wei=C3=9Fschuh?= , Andrew Morton , Thorsten Leemhuis , linux-kernel@vger.kernel.org, Arnaldo Carvalho de Melo Subject: [PATCH v3 3/7] perf build: Add MINIMAL=1 to build without optional features Date: Sun, 1 Nov 2026 21:12:49 -0500 Message-ID: <20261102021253.2545235-4-sashal@kernel.org> X-Mailer: git-send-email 2.53.0 In-Reply-To: <20261102021253.2545235-1-sashal@kernel.org> References: <20261102021253.2545235-1-sashal@kernel.org> X-Mailing-List: linux-kbuild@vger.kernel.org List-Id: List-Post: List-Help: List-Subscribe: List-Unsubscribe: List-Owner: Precedence: list MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Turning off every optional feature takes a long list of NO_* variables, and the list has to follow features as they are added and renamed. The one in tests/make for make_minimal has fallen behind: it leaves libtraceevent, jevents, slang, AIO, LZMA, zlib, libLLVM and Rust to be detected, so a make_minimal build still needs libtraceevent and python. Add MINIMAL=1, which turns off every optional feature, the BPF skeletons, and the shellcheck, mypy and pylint runs. perf then builds, natively or cross, with no library beyond the C library and without python, pkg-config, clang or rustc, and the result does not depend on what is installed on the build machine. A MINIMAL=1 build also leaves out the notices that post unwind and python support are disabled, which it asked for, and the one about the pkg-config search path for cross builds, as pkg-config is not needed then. It is handled in Makefile.perf rather than Makefile.config, as Makefile.config is included after the pkg-config, shellcheck, mypy and pylint setup. Use it for make_minimal in tests/make. Suggested-by: Ian Rogers Link: https://lore.kernel.org/r/CAP-5=fWFY-tpJz2vcBZvurwdZY5gwd8cuTemE9q1rtZ0Vi0dng@mail.gmail.com Signed-off-by: Sasha Levin Acked-by: Namhyung Kim Acked-by: Arnaldo Carvalho de Melo --- tools/perf/Makefile.config | 8 ++++++-- tools/perf/Makefile.perf | 42 ++++++++++++++++++++++++++++++++++++-- tools/perf/tests/make | 8 +------- 3 files changed, 47 insertions(+), 11 deletions(-) diff --git a/tools/perf/Makefile.config b/tools/perf/Makefile.config index b4764f69f47f4..4af7934887539 100644 --- a/tools/perf/Makefile.config +++ b/tools/perf/Makefile.config @@ -753,7 +753,9 @@ dwarf-post-unwind-text := BUG # setup DWARF post unwinder ifdef NO_LIBUNWIND ifdef NO_LIBDW - $(warning Disabling post unwind, no support found.) + ifneq ($(MINIMAL),1) + $(warning Disabling post unwind, no support found.) + endif dwarf-post-unwind := 0 else dwarf-post-unwind-text := libdw @@ -828,7 +830,9 @@ endif PYTHON_EXTENSION_SUFFIX := '.so' ifdef NO_PYTHON_MODULE - $(call disable-python,Python support disabled by user) + ifneq ($(MINIMAL),1) + $(call disable-python,Python support disabled by user) + endif else ifndef PYTHON diff --git a/tools/perf/Makefile.perf b/tools/perf/Makefile.perf index b74b534e1153f..c178c3976d154 100644 --- a/tools/perf/Makefile.perf +++ b/tools/perf/Makefile.perf @@ -129,6 +129,9 @@ include ../scripts/utilities.mak # Define NO_MYPY if you do not want to run mypy during build # # Define NO_PYLINT if you do not want to run pylint during build +# +# Define MINIMAL=1 to build without any optional feature, needing only a C +# compiler and library, flex and bison # As per kernel Makefile, avoid funny character set dependencies unexport LC_ALL @@ -174,6 +177,39 @@ endef LD += $(EXTRA_LDFLAGS) +# MINIMAL=1 is handled here rather than in Makefile.config, which is included +# after the pkg-config, shellcheck, mypy and pylint setup below +ifeq ($(MINIMAL),1) + NO_LIBELF := 1 + NO_LIBDW := 1 + NO_LIBTRACEEVENT := 1 + NO_JEVENTS := 1 + NO_PYTHON_MODULE := 1 + NO_LIBBPF := 1 + BUILD_BPF_SKEL := 0 + NO_SLANG := 1 + NO_DEMANGLE := 1 + NO_BACKTRACE := 1 + NO_AIO := 1 + NO_ZLIB := 1 + NO_LZMA := 1 + NO_LIBZSTD := 1 + NO_LIBNUMA := 1 + NO_LIBLLVM := 1 + NO_CAPSTONE := 1 + NO_LIBPFM4 := 1 + NO_LIBDEBUGINFOD := 1 + NO_BABELTRACE2 := 1 + NO_SDT := 1 + NO_JVMTI := 1 + NO_RUST := 1 + NO_PERF_READ_VDSO32 := 1 + NO_PERF_READ_VDSOX32 := 1 + NO_SHELLCHECK := 1 + NO_MYPY := 1 + NO_PYLINT := 1 +endif + # Some distros provide the command $(CROSS_COMPILE)pkg-config for # searching packges installed with Multiarch. Use it for cross # compilation if it is existed. @@ -195,8 +231,10 @@ else PKG_CONFIG_LIBDIR := $(PKG_CONFIG_LIBDIR):/usr/local/share/pkgconfig/ PKG_CONFIG_LIBDIR := $(PKG_CONFIG_LIBDIR):/usr/share/pkgconfig/ export PKG_CONFIG_LIBDIR - $(warning Missing PKG_CONFIG_LIBDIR, PKG_CONFIG_PATH and PKG_CONFIG_SYSROOT_DIR for cross compilation,) - $(warning set PKG_CONFIG_LIBDIR for using Multiarch libs.) + ifneq ($(MINIMAL),1) + $(warning Missing PKG_CONFIG_LIBDIR, PKG_CONFIG_PATH and PKG_CONFIG_SYSROOT_DIR for cross compilation,) + $(warning set PKG_CONFIG_LIBDIR for using Multiarch libs.) + endif endif endif endif diff --git a/tools/perf/tests/make b/tools/perf/tests/make index 7524de5228029..bef5599b95d6f 100644 --- a/tools/perf/tests/make +++ b/tools/perf/tests/make @@ -119,13 +119,7 @@ make_install_prefix := install prefix=/tmp/krava make_install_prefix_slash := install prefix=/tmp/krava/ make_static := LDFLAGS=-static NO_PERF_READ_VDSO32=1 NO_PERF_READ_VDSOX32=1 NO_JVMTI=1 NO_LIBTRACEEVENT=1 NO_LIBELF=1 -# all the NO_* variable combined -make_minimal := NO_PYTHON_MODULE=1 -make_minimal += NO_DEMANGLE=1 NO_LIBELF=1 NO_BACKTRACE=1 -make_minimal += NO_LIBNUMA=1 NO_LIBBIONIC=1 NO_LIBDW=1 -make_minimal += NO_LIBBPF=1 -make_minimal += NO_SDT=1 NO_JVMTI=1 NO_LIBZSTD=1 -make_minimal += NO_CAPSTONE=1 +make_minimal := MINIMAL=1 # binutils 2_42 and newer have bfd_thread_init() new_libbfd := $(shell echo '#include ' | $(CC) -E -x c - | grep bfd_thread_init) -- 2.53.0